Finding the Fourth Proportional to 21,492.64, 29,662.74 and 12,061.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,492.64 : 29,662.74 = 12,061.72 : x
2. Step 2: Convert to fraction form
   21,492.64/29,662.74 = 12,061.72/x
3. Step 3: Cross multiply
   21,492.64x = 29,662.74 × 12,061.72
4. Step 4: Simplify right side
   21,492.64x = 357,783,664.31
5. Step 5: Solve for x
   x = 357,783,664.31/21,492.64
6. Step 6: Final answer
   x = 16,646.80